Key Extraction From The Primary Side Of A Switched-Mode Power Supply
PROCEEDINGS OF THE 2016 IEEE ASIAN HARDWARE ORIENTED SECURITY AND TRUST SYMPOSIUM (ASIANHOST 2016)(2016)
摘要
In this paper we detail techniques that can be used to analyze and attack an AES implementation on an FPGA from the primary (i.e., external) side of a switched-mode power supply. Our attack only requires measurements of the duty cycle of the power supply, and then increases the signal-to-noise ratio (SNR) though averaging, deconvolution and wavelet based detrending. The result is an exploitable source of leakage that allows a secret key to be determined from low-frequency power measurements. The techniques and procedures provide a general approach to performing differential power analysis (DPA) from a single point of information for any single hypothesized intermediate value, suggesting their potential for improving other types of side-channel analysis.
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关键词
switched-mode power supply,AES implementation,FPGA,signal-to-noise ratio,deconvolution,wavelet based detrending,differential power analysis,DPA,side-channel analysis
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